やや長周期微動に基づく深層地下構造推定手法の神戸市東部への適用

概要

論文の詳細を見る
Horizontal array observations for vertical long-period microtremors have been performed in the eastern part of Kobe. Phase velocities were evaluated by means of the f-k spectral analysis using the records. However, the deep subsurface structure could not be determined only from the dispersion of phase velocities, because it could be given by some different structures. Then, horizontal-to-vertical spectral ratios at the central point were calculated. Referring the ratios, the optimal structure has been determined. Moreover, the base rock depth distribution under Kobe area shown in the previous paper has been reestimated based on the optimal structure. Combination of the two types of observations makes the deep subsurface structure estimation methodology more reliable and applicable.
社団法人日本建築学会の論文
1998-10-30